DS18S20 High-Precision 1-Wire Digital Thermometer

ROM COMMANDS FLOW CHART Figure 14DS18S20InitializationSequenceMASTER TXRESET PULSEDS18S20 TXPRESENCEPULSEMASTER TX ROMCOMMAND33hREAD ROMCOMMAND55hF0hCChNEChNN NMATCH ROMSEARCH ROMALARM SEARCHSKIP ROM NCOMMANDCOMMANDCOMMANDCOMMANDY Y Y Y YMASTER TXBIT 0DS18S20 TX BIT 0DS18S20 TX BIT 0DS18S20 TX BIT 0DS18S20 TX BIT 0MASTER TX BIT 0MASTER TX BIT 0DS18S20 TXFAMILY CODE1 BYTEBIT 0MATCH?NNBIT 0MATCH?DEVICE(S)WITH ALARMFLAG SET?NDS18S20 TXSERIAL NUMBER6 BYTESYYYDS18S20 TX BIT 1DS18S20 TXCRC BYTEMASTER TXBIT 1DS18S20 TX BIT 1MASTER TX BIT 1BIT 1MATCH?NNBIT 1MATCH?YYDS18S20 TX BIT 63MASTER TXBIT 63DS18S20 TX BIT 63MASTER TX BIT 63BIT 63MATCH?NNBIT 63MATCH?YYMASTER TXFUNCTIONCOMMAND(FIGURE 15)16 of 22